BB: Solving and Optimizing Large-Scale Nonlinear Systems

Barzilai-Borwein spectral methods for solving nonlinear
system of equations, and for optimizing nonlinear objective
functions subject to simple constraints. A tutorial style
introduction to this package is available in a vignette on the
CRAN download page or, when the package is loaded in an R
session, with vignette("BB").

Ravi Varadhan [aut, cph, trl],
Paul Gilbert [aut, cre],
Marcos Raydan [ctb] (with co-authors, wrote original algorithms in
fortran. These provided some guidance for implementing R code in
the BB package.),
JM Martinez [ctb] (with co-authors, wrote original algorithms in
fortran. These provided some guidance for implementing R code in
the BB package.),
EG Birgin [ctb] (with co-authors, wrote original algorithms in fortran.
These provided some guidance for implementing R code in the BB
package.),
W LaCruz [ctb] (with co-authors, wrote original algorithms in fortran.
These provided some guidance for implementing R code in the BB
package.)